Articulating Torsional Coupling

a torsional coupling and articulating technology, applied in the direction of yielding couplings, couplings, rotary machine parts, etc., can solve the problems of limiting their application to certain environments, cardan joints producing non-uniform rotational output characteristics, and creating vibration disturbances

Active Publication Date: 2019-03-14
HARRIS DYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The design achieves a high articulation angle capability while maintaining constant velocity output, enhancing durability and reducing heat generation, thus enabling its use in high-load and space-restricted applications like automotive powertrains.

Problems solved by technology

Different coupling designs exhibit particular operating and performance characteristics that limit their application to certain environments.
However when operating at an angle, the Cardan joint produces a non-uniform rotational output characteristic when provided with a uniform input characteristic.
This non-uniform rotational characteristic results in the output shaft speeding up and slowing down twice every revolution, resulting in creation of vibration disturbances.
Because of this condition, operating angles of Cardan joints are often limited to keep torsional disturbances within acceptable limits for a given application.
This condition worsens as the torque, speed and angle operating parameters increase.
In addition, the most common sealing element for these joints is an elastomeric boot that is often exposed to road debris.
Once the boot is torn, these CVJs become quickly contaminated and exhibit a significantly reduced operating life.
Both Cardan joints and ball-type CVJs have limited articulation angles which can restrict the design of the systems to which they are applied.
For example, the range of suspension movement in a vehicle, particularly an off-road vehicle, is limited to prevent over-angulation of the halfshafts that connect the axle differential to the wheel ends.
While these joints can be made to articulate at relatively high angles, they suffer from durability issues.
These issues are due to the component designs deemed necessary to permit high operating angles without articulated component interference.
Thus, prior link-type CVJs have not provided the power density necessary to permit their use in high load and space restricted applications, such as automotive powertrains.

Method used

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  • Articulating Torsional Coupling
  • Articulating Torsional Coupling
  • Articulating Torsional Coupling

Examples

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Embodiment Construction

[0062]Referring now to the drawings, there is illustrated in FIGS. 1 and 2, a first embodiment of a link-type CV coupling, shown generally at 10. The CV coupling 10 includes a driving portion 12 and a driven portion 14. It should be understood that the terms “driving” and “driven” are indicative of the direction of torque input and output. These terms are for description purposes and are not intended to limit the structure or orientation of the CV coupling 10. The driving portion 12 is illustrated having an outer housing 16. The driven portion 14 also includes an outer housing 18 that is similar to outer housing 16, though such is not required. The driving portion 12 and the driven portion 14 may share many common features and elements. These common features and elements will be identified by the same reference numbers. These common elements will be described in the context of either the driving or driven portions, as best shown in the illustrated embodiments. The driving outer hous...

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Abstract

A constant velocity joint having driving and driven pivot arm segments coupled together with a pivotal bearing element provides high power density transmission through a large dynamic angle. The constant velocity joint may be configured for axial movement, such as a plunge capability, or may be a fixed center joint.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a divisional patent application of U.S. patent application Ser. No. 15 / 304,241; filed Oct. 14, 2016. U.S. patent application Ser. No. 15 / 304,241 is the U.S. National Phase of International Application PCT / US2015 / 055011 filed Oct. 9, 2015 which designated the U.S. and that International Application was published in English under PCT Article 21(2) on Apr. 14, 2016 as International Publication Number WO / 2016 / 057967. PCT / US2015 / 055011 claims priority to U.S. Provisional Application No. 62 / 061,927, filed Oct. 9, 2014. Thus, the subject nonprovisional divisional application claims priority to U.S. Provisional Application No. 62 / 061,927, filed Oct. 9, 2014. The disclosures of these applications are incorporated herein by reference in their entirety.BACKGROUND OF THE INVENTION[0002]This invention relates in general to torque transmitting couplings. In particular, this invention relates to an articulating torsional coupling hav...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): F16D3/30
CPCF16D3/30Y10S464/904Y10S464/905Y10S901/29Y10T74/20335
InventorHARRIS, TREVOR L.
OwnerHARRIS DYNAMICS